I'm sorry that I was too busy keeping Liam from emptying an entire 2 gallon container of vinegar into the plastic mountain to get pictures of the Volcano in action, but suffice to say, it was a big, messy hit.
Next up was slime. Honestly, if Liam hadn't been along and chosen it, the Slime kit would've stayed at Target. But Liam was so excited he begged for two days, until we finally had nice enough weather for another outdoor science experiment.
The kit came with powders and dyes, so that you could make the slime red or green, glow-in-the-dark or magnetic.
Unfortunately, I wasn't able to find kid-friendly explinations of chemical reactions that Liam could access right now. I'm thinking of breaking out the microscope and starting to examine things under higher and higher magnification, until we can talk about molecules. In the meantime, chemistry is just, fizz, ooze, ewwww.